Sash lock for bus or car window construction



March 3, 1936..

J. SCHUNK ,03 3

SASH LOOK FOR BUS 0R CAR WINDOW CONSTRUCTION Filed Jan. 12, 1934 2 Sheets-Sheet li i I i a: H- 1 4 47 I N VEN TOR.

4a LIUEEPH SLHUNK ,0 1 2; J4 WM 1/ Y A TTORNEYS.

arch 3, 1936. J. SCHUNK 2,033,085

SASH LOCK FOR BUS OR CAR WINDOW CONSTRUCTION Filed Jan. 12, 1954 2 Sheets-Sheet 2 O INVENTORQ LlnsaPl-r ETELHUNK g ,1 ram ATTORNEYS.

Patented Mar. 3, 1936 SASH LOCK FOR BUS OR CAR WINDOW CONSTRUCTION Joseph Schunk, Newark, N. J., assignor to The National Lock Washer Company, Newark, N. J a corporation of New Jersey Application January 12, 1934, Serial No. 706,367

'7 Claims.

The present invention relates to a sash lock for bus or car window construction, and has for its object to provide a sash look which may be conveniently incorporated in the bottom rail of a window sash, and which will be inconspicuous, easy to operate, efi'icient in operation, and in which the operating parts will at all times be held against rattling and vibration. It is proposed to provide a sash lock adapted to be incorporated as an inherent part of a bottom rail of known design, and particularly of the type as disclosed in the Letters Patent for Bus or car window construction, in the name of T. G. Conway, S. E. Blessin and J. Schunk, No. 1,976,773, dated October 16, 1934, without the necessity for materially altering such bottom rail construction.

It is further proposed to provide a sash lock construction in which the latch casing is provided as a part of the structure of the side strap of the sash, and which will constitute means for connecting the side strap to the bottom rail. Another object is to provide a sash lock construction in which the lock parts may be readily assembled as a unit within the bottom rail, and also may be readily removed as a unit. A further object is to provide a sash lock construction in which the plunger is disposed and movable substantially in the vertical plane of the sash, and which is adapted to cooperate with a rack disposed in the side channel in which the sash slides, and which is also substantially in the central vertical plane of the sash, to the end that the sash lock is disposed within a minimum thickness, and a window construction is provided which is compact, neat in appearance, and of maximum clear vision, all features highly desirable in bus and car window construction.

With the above and other objects in view embodiments of the invention are shown in the accompanying drawings, and these embodiments will be hereinafter more fully described with reference thereto, and the invention will be finally pointed out in the claims.

In the drawings:

Fig. l is a fragmentary front elevation showing the lower corner of a window construction in which is incorporated a sash lock, according to the exemplary illustratedembodiment of my invention.

Fig. 2 is a horizontal sectional view, taken along the line 2-2 of Fig. 1.

Fig. 3 is a vertical sectional view, taken along the line 3-3 of Fig. 2, the lock plunger and its connected parts, and also the sash glass, being shown in elevation.

Fig. 4 is a horizontal sectional plan view, taken along the line 2-2 of Fig. 1,-but with the sash glass removed.

Fig. 5 is a. vertical sectional view, enlarged, taken along the line 5-5 of Fig. 1.

Fig. 6 is a vertical sectional view, enlarged, taken along the line 6-6 of Fig. 1.

Fig. 7 is a perspective view of the lower end of the side strap having the sash lock casing member secured thereto.

Fig. 8 is a perspective view of the lock plunger and connected parts.

Fig. 9 is a perspective view of the stop post employed.

Fig. 10 is a perspective view of the end portion of the bottom rail.

Fig. 11 is an end elevation of the lower end of the side strap shown in Fig. 7.

Fig. 12 is a fragmentary front elevation of the lower corner of a window construction in which a sash lock, according to a modified embodiment of the invention, is incorporated.

Fig. 13 is a fragmentary top plan view of a modified form of plunger and connected parts.

Fig. 14 is a top plan view of a modified front of stop post.

Similar reference characters indicate corresponding parts throughout the several figures of the drawings.

Referring to the drawings, the window sash, with which the sash lock according to my invention is incorporated, comprises a sash glass I having a top rail (not shown), a bottom rail 2, and a pair of vertical side straps 3 connecting the top and bottom rails, only one of these straps being shown. The side straps are adapted to have vertical sliding movement in the channels mounted on the side posts, hereinafter more fully referred to.

The bottom rail 2 is of channel shape to receive the lower edge of the sash glass. Upon the inner surface of each side of the channel longitudinally extending reinforcing ribs 4-6 are provided intermediate the top and bottom of the channel, and in the base of the channel there is provided a longitudinal groove 5 of corresponding width to the spacing of the ribs 4-4, there being longitudinally extending grooves or recesses 6-5 in the respective sides of the channel between the ribs 4-4 and the longitudinal groove 5. The edge of the glass l is bound with glazing tape 1, and when inserted in the channel of the rail the ribs 4-4 act as stops to limit the depth to which the glass may be engaged. The sash lock, according to my invention, is inserted and housed within the channel beneath the sash glass, and in mounting and connecting the same the sides of the channel are drawn into tight engaging relation with the glass, as will presently more fully appear. Within a T-groove 8 in the lower end of the rail there is interlockingly engaged theT-rib 9 of a sealing strip Ill, of rubber, felt or other suitable sealing material, for engaging upon the sill H, a. slot l2 being formed in the under surface of said strip for rendering the strip more flexible.

The side strap 3 is in the form of a U-shape channel, and is adapted to receive the Vertical edge of the glass, its vertical edges being bent outwardly and rearwardly, as at I l-l4, to engage the edge of the U-shape piece of facing material 15, which is cemented, riveted or otherwise suitably secured about the side strap, this material being of a suitable composition similar to felt or leather as regards its wearing and sealing qualities and adapted to have easy sliding engagement in the side post channel.

The lower end of the side strap has secured to it a tubular casing member I6 of rectangular cross section. For this purpose a pair of angle brackets l'll'l are secured to the sides of the casing by spot-welding or other suitable means, these brackets being engaged through slots l8-l 8 in the forward edges of the side strap and having their vertical portions engaged with the outer side surfaces of the side strap and secured thereto by spot-welding or other suitable means. The lower portion of the side strap has its sides slightly contracted, as indicated by the offset bends IS-iS in Figs. '7 and 8, so that the inner surfaces of the side strap are substantially flush with the vertical inner surfaces of the casing I6, while the outer surfaces above the ofiset bends l9 l 9 are substantially flush with the outer surfaces of the brackets H. A slot is provided in the rear surface of the side strap in registering alignment with the passage through the casing l6 and a similar slot 3| is also provided in the facing material l5 for permitting the end of the lock plunger to passthrough, as will presently more fully appear. Holes 22 extend through the side straps H and the casing [6 for receiving tie bolts employed in assembling the parts, as hereinafter more fully referred to.

The sash lock plunger 23 is in the form of an elongated rectangular cross-section bar having a beveled rack engaging nose 24 at its outer end andhaving a pair of guide slots 25 and 26 between its ends. A notch 2'! is provided near its inner end and is adapted to be engaged by the lug 28 of the operating lever 29, hereinafter more fully referred to. An extension rod 30 is provided upon the inner end of the plunger and has engaged thereon a U-shaped straddler or pressure member 3!, an aperture 32 being provided in the intermediate portion of said member for sliding engagement upon the rod, and the sides of the member embracing the end of the plunger. The straddler member is normally pressed forwardly toward the end of the plunger by means of the plunger spring 33 disposed about the rod 30 between the straddler member and a washer 34 slidably mounted upon the end of the rod and retained thereon by means of an enlargement 35 formed upon the end of the rod. It should be noted that the enlargement 35 serves to retain the washer spring and straddler member in place upon the plunger when these parts are in disassembled relation as a unit. In the assembled relation in, the sash rail the. rod 30 is engaged.

through the pass-age 36 of a stop 'post 31 secured in the groove 5 of the rail by means of a screw 38, this part being secured before attachment of the rubber sealing strip It. The passage 36 is of larger diameter than the enlargement 35 so that the latter can be readily passed through it when assembling and disassembling the plunger and connected parts. In the assembled relation of the parts the washer 34 abuts the stop post compressing the spring 33, the stop post acting as a fixed part against which the spring reacts.

The straddler member 3! is pressed back in the assembled relation, as shown in Figs. 3 and 4, so that its forward edges are substantially in line with or slightly forward of the edge of the recess 27, and normally presses against the lever lug 28, which in turn is pressed against the opposed side of the recess 2?. In this way the lock parts and the operating lever are at all times held against looseness and rattling under pressure of the spring 33, the straddler member being so arranged that it takes up all lost motion and compensates for wear and variations in the parts. This condition obtains even after considerable wear upon the parts and also under the continuous vibration to which the parts are subjected in the usual bus and car installations.

The plunger and its connected parts are as-- sembled as a unit in the sash rail 2 with the side. strap removed. Thereupon the side strap is connected by first engaging the casing member l5 over the plunger and then forcing the casing member into the channel of the bottom rail 2, the longitudinal ribs l4 engaging the sides of the casing at its upper portion and the lowerportion of the casing being engaged in the groove 5, while the portions of the brackets I! at the sides of the casing engage in the grooves 6-6, as clearly shown in Fig. 5. As the side rail is forced to its limit position against the end of the bottom rail the nose end 24 of the plunger projects through the slots 28 and 2| of the side strap. The parts are then secured in place by means of transversely disposed binding screws 39 and 40, each comprising an interiorly threaded socket screw part and an exteriorly threaded screw part to engage the socket part, suitable countersunk holes fill being provided in the bottom rail to re:- ceive these parts.

The binding screw 39 extends through the holes screw serving to secure the side strap against displacement and also providing a movement lim iting guide for the plunger. The binding screw 43 extends through the slot 26 of the plunger,

and this binding screw is also utilized for secur- 4 ing one end of the operating lever casing; as will presently more fully appear. The engagement and bracket ll so that a rigidly assembled structure results.

The operating lever casing 4| is of substantially U-shape having an attaching ear portion 42,:

at one end which is secured to the side of the bottom rail by the binding screw and a re1a tively elongated base portion at its, other end which is secured to the bottom rail by a binding screw 44. A window lift flange 45 is formed at the upper edge of the base 43 and is disposed. beneath the finger engaging, extension portion. 46 of the operating lever 29, so that. the. latter;

1 50 22 in the casing l5 and brackets l'l andalso extends through the slot 26 of the plunger, this may be conveniently operated by engaging the thumb with its upper side and the fingers with the lower side of the lift flange 45. The fulcrum lug 41 of the operating lever 29 is formed upon its face near its lower end and is pivotally seated in a recess 48 formed in the casing. The lug 28 of the operating lever extends to the interior of the bottom rail into engagement with the recess 21 of the plunger through an arcuate slot 49 formed in the side of the rail, and between the inner surface of the lever and the side surface of the rail there is provided a wear plate 50, also having an arcuate slot registering with the slot 49, and provided with right angularly bent ends 5252 which engage the ends of the casing. This wear plate protects the rail surface from the rubbing action of the lower part of the operating lever when the same is moved to operate the lock plunger.

The channel within which the side strap of the sash is slidably mounted comprises an outside stop 53 secured to the side post and an inside stop 54 removably connected to the outside stop and constituting therewith a channel. Within this channel there is provided a rack 55 with which the lock plunger engages. It will be understood that the particular form of the side post channel and the means by which the rack is mounted therein forms no part of the present invention, and that these parts may be of any desirable construction. As illustrated, the rack is mounted within a channel strip 56, being secured to the base of this strip by any suitable means as spot-welding or rivets. The edges of the strip are bent inwardly, as at 5157, and bear upon the facing material 15, and a spring 58 is disposed between the base of the outside stop 53 and the base of the channel strip and presses the latter into snug engagement with the facing strip l5. This construction provides a relatively narrow channel in which the rack is in alignment with the central vertical plane of the sash and is also effectually concealed.

In Fig. 12 I have illustrated a modified form of the invention, in which the window lift 45 and lever extension 46 is provided at the left hand side of the operating lever rather than at the right hand side, as shown in the first embodiment. In this case the fulcrum lug 17 of the operating lever 29 is above the lug l8 and engaged in a bearing opening 48 in the casing M the arcuate slot 49 in the rail 2 being described about the axis of the fulcrum lug 41*, so that it is in inverted relation to the slot 49, as shown in the first embodiment. The rod 36 of the plunger 23 is disposed at the lower portion of the end of the plunger so that it clears the binding screw M which in this case extends through the ear 42 of the casing. The binding screw 40 extends through the base 43 of the casing, and also through the slot 26 of the plunger, which in this case is located near the upper edge of the plunger. The construction and operation is otherwise the same as in the first embodiment.

In Figs. 13 and 14 I have shown a modified form of plunger and stop post adapted to be assembled in or removed from the sash rail without removal of the side strap. The plunger 23 is swedged or otherwise reduced in thickness, as at 6|, at its inner end adjacent the notch 27', the straddler or pressure member Si which engages over this portion being of a thickness no greater than the thickness of the plunger. The spring 33 disposed about the extension rod 36 is of a diameter no greater than the thickness of the plunger, as is also the washer 34 retained upon the rod by the enlargement 35 These parts may thus be inserted in and removed from the rail through the slot 20 in the side strap and through the tubular casing 16 without removing these parts. The stop post 37* having a passage 36', through which the rod 39 engages, in the assembled relation, is also of such reduced thickness that it may be assembled or removed through the slot 20.

I have illustrated and described preferred and satisfactory embodiments of the invention, but it will be obvious that changes may be made therein, within the spirit and scope thereof, as defined in the appended claims.

Having thus described my invention what I claim and desire to secure by Letters Patent is:-

1. In a sash lock window construction, a rail having a longitudinally extending opening therein, a lock plunger disposed in said opening projected from one end and having longitudinal movement therein, means secured to said rail disposed in the path of said plunger and adapted to limit its projecting movement, a stop secured in said opening, spring means disposed between said plunger and said stop and urging the plunger toward its projected position, and a removable operating member mounted upon said rail engaging said plunger and adapted to be operated to retract it, said plunger being retained by said first mentioned means upon removal of said operating member.

2. In a sash lock Window construction, a rail having a longitudinally extending opening therein, a lock plunger disposed in said opening projected from one end and having longitudinal movement therein, means secured to said rail disposed in the path of said plunger and adapted to limit its projecting movement, a stop secured in said opening, spring means disposed between said plunger and said stop and urging the plunger toward its projected position, an operating member mounted upon said rail engaging said plunger and adapted to be operated to retract it, and a pressure member disposed between said spring means and said operating member normally pressing said operating member against said plunger under the pressure of said spring means.

3. In a sash lock window construction, a rail having a longitudinally extending opening therein, a lock plunger disposed in said opening projected from one end and having longitudinal movement therein, means secured to said rail disposed in the path of said plunger and adapted to limit its projecting movement, a stop secured in said opening, spring means disposed between said plunger and said stop and urging the plunger toward its projected position, an operating member mounted upon said rail engaging said plunger and adapted to be operated to retract it, and a pressure member slidably mounted on said plunger disposed between said spring means and said operating member normally pressing said operating member against said plunger under the pressure of said spring means.

4. In a sash lock window construction, a rail having a longitudinally extending opening therein, a lock plunger disposed in said opening projected from one end and having longitudinal movement therein, said plunger having a pair of longitudinally spaced abutment portions near its inner end, means secured to said rail disposed in the path of said plunger and adapted to limit its projecting movement, a stop secured in said opening, spring means disposed between said plunger and said stop and urging the plunger toward its projected position, an operating member mounted upon said rail engaged between said abutment portions of said plunger and adapted to be operated to retract it, and a pressure member disposed between said spring means and said operating member normally pressing said operating member against the forward abutment portion under the pressure of said spring means.

5. In a sash lock window construction, a rail having a longitudinally extending opening therein, a lock plunger disposed in said opening projected from one end and having longitudinal movement therein, means secured to said rail disposed in the path of said plunger and adapted to limit its projecting movement, a stop secured in said opening in inwardly spaced relation to the inner end of said plunger, a longitudinal rod secured to and extending rearwardly of said plunger, a pressure member slidably engaged upon said rod adjacent the inner end of said plunger, a washer member slidably engaged upon the other end of said rod, spring means disposed between said pressure member and said washer member, and an operating member mounted upon said rail engaging said plunger and said pressure member and adapted to be operated to retract said plunger, said washer member engaging said stop to compress said spring whereby said pressure member normally presses said operating member against said plunger to take up lost motion.

6. In a sash lock window construction, a rail having a longitudinally extending opening therein, a lock plunger disposed in said opening projected from one end and having longitudinal movement therein, removable means secured to said rail disposed in the path of said plunger and adapted to limit its projecting movement, a stop secured in said opening in inwardly spaced relation to the inner end of said plunger and having a passage therethrough, a longitudinal rod secured to and extending rearwardly of said plunger, a washer member slidably engaged upon the end of said rod, spring means disposed between said plunger and said washer member, retaining means on said rod for retaining said washer thereon, and a removable operating member mounted upon said rail engaging said plunger and adapted to be operated to retract it, said rod adapted to pass freely through the passage of said stop and said washer member engaging said stop to compress said spring, said plunger, rod, washer member and spring means being longitudinally engageable in and removable from said opening as a unit upon removal of said removable means and said removable operating member.

7. In a sash lock window construction, a rail having a longitudinally extending opening therein, a lock plunger disposed in said opening projected from one end and having longitudinal movement therein, removable means secured to said rail disposed in the path of said plunger and adapted to limit its projecting movement, a stop secured in said opening in inwardly spaced relation to the inner end of said plunger and having a passage therethrough, a longitudinal rod secured to and extending rearwardly of said plunger, a, pressure member slidably engaged upon said rod adjacent the end of said plunger, a washer member slidably engaged upon the other end of said rod, spring means disposed between said pressure member and said washer member, retaining means on said rod for retaining said washer thereon, and a removable operating member mounted upon said rail engaging said plunger and said pressure member and adapted to be operated to retract said plunger, said rod adapted to pass freely through the passage of said stop and said washer member engaging said stop to compress said spring whereby said pressure member normally presses said operating member against said plunger to take up lost motion, said plunger, rod, pressure member, washer member and spring means being longitudinally engageable in and removable from said opening as a unit upon removal of said removable means and said removable operating member.

JOSEPH SCH-UNK. 

